While you are on the site, in your browser find and click "Add to Home Screen" A CGN beaver app icon will then be created to your phone that is directly link to the site.
Note: This feature may not be available in some browsers.
No need for it.
Just move your head away from the scope untill you see full circle of the aperture with reticle in the middle of it.
If you put anything on stock, your cheek will suffer from recoil lash.